#include<stdio.h>
int main()
{
	int y, m;
	scanf("%d %d", &y, &m);
	
	int flag=(y%400==0||y%4==0&&y%100!=0);
	switch(m)
	{
		case 1: case 3: case 5: case 7: case 8: case 10: case 12:
			printf("%d",31);
			break;
		case 4: case 6: case 9: case 11:
			printf("%d",30);
			break;
		case 2:
			if(flag)
			printf("%d",29);
			else
			printf("%d",28);
			break;
	}
	return 0;
}
